Outlet or junction box.



G. A. LUTZ.

OUTLET OR JUNCTION BOX.

APPLICATION FILED PEB. 12. 190e.

91 5743. Patented Mar. so, 1909.

- lljrhllfldlr@ GEORGE A. LUTZ, OF PLAINFILD, NEW JERSEY, SSIGNOR TOAMERICAN CIRCULAR LOOM COMPANY, OF PORTLAND, MAINuI. A CORPORATION OFMAINE.

Application led February 12, 1998.

Specification ox. Letters Patent.

outlet or junction boxes for use in connection wli conduits or electriccenone* l l and tl'ieobject of iny invention is to provide improvedineans for detachably cmineeting` the lrnocxouts o'r plugs with theoutlets or openings olf the box. and to provide unii'orin surfaces toreceive the nuts or inst-enthat connect the conduits with the box.

depressed or couutersunk `langes at the t." or openings noviding seatsadjacent o and lrnoclronts or plugs firmly l in such seats to close theoutlets or openings, whereby when a conduit is lo be attached to the boxthe knockout or plug' may be readily removed to permit the conduit topass into the outlet or opening. rl`he inner surfaces of said flangesare at a distance or raised from the box walls and may be niadesubstantially so that the nut or fastening' for the conduit reay bearfirmly and uniformly against such flange without en ;'aging` the wall etthe box. This will be found advantageous where the box is circular' inshape so that the nut or y 'Fastening' in ay have a irni seat.

Reference is to be had to the accompanying drawings forming part hereof.wherein. Figure l is a plan view ol an outlet or junction box embodyinginy invention. and Fig. 2 is a cross section substantially on the line2, 2, in Fig. l.

The box l. which may generally be or well known or suitableconstraction.l and which in the drawings is shown in circular torni, isprovided in one or incre of its walls with outlets or openings 2 eachadapted to receive a suitable conduit 3 for electric conductors. Theoutlets or openings 2 are formed within flanges e shown located infardlyfrom the corresponding wall of the box as by being' depressed or counersunlt, providing' seats 5 to receive knockouts or plugs 6. The boxwith its flanggjes Ll and seats 5 may be formed by drawing suitablePatented March 30, 1909.

Serial No. 415,935.

sheet metal. in dies to the 'torni desired ere by the llanges l will beotliset or raised ron; tie Correspending` wall or the box as )y thebosses la troni which the anges exand said flanges will act as interior.businenls :urainst which the lrnoclrouts or lugs i inay bear whenlitted snugly vithin s to keep the lcnocliouts i''roin ilallor being'pushed into the box. The conuits l pass through the openings 2 and titwithin llan` es e. and the nuts T, which in The drawings are shownadapted to be screwed upon threads on the conduits7 bear against theinner faces ot the llanges and the latter are oli'set troni the inner'walls or the box, the nuts are free to rotate against the relativelyuniforin surfaces of the flanges .'a'ithe it engaging the walls or thebox, thus providing a lirin litting. and also closure oi openings Q.

Instead of making the box and its flanges oi: drawn sheet inetal thesaine may be made by casting the saine of suitable inetal with 'i'flanges #l and seats 5 arranged as setforth.

The lrnoclzouts or plugs 6 will preferably be of such diniensions withrespect to seats to be forced into the latter and to remain in positionby rictional engagement with such seats, and yet said lrnoclrouts inaybe readily removed by striking' theni through the openings 2 troniwithin the box to push there. outwardly.

Having now described niy invention what claim is:

l. Jin outlet or junction box having flanges surrounding' outlets oropenings and otlset from the walls of the box and located within the boxoroviding seats adjacent the llang'es, unobstructed on their outersides, aud knoclroius detachably litted in said seats.

2. .fin outlet or junction box having integral internal flanges offsetinwardly :troni the inner walls thereof and surroundlno' the utletsthereof providing seats without the ino; s and lrnoclrouts detachablysecured 1n A Elli@ otset from the Walls of the box, the inner faces ofsaid flanges being uniform and flat, combined with pipes passing throughsaid openings and having threads Within the box, and nuts fitting onsaid pipes Within the box and bearing upon said faces of said flanges.

Signed at New York city, in the county oi' New York, and State of NewYork, this lOth day of February, A. D. 1908.

GEORGE A. LUTZ.

Vfitnesses T. F. BOURNE, MARIE F. VVAINRIGHT.

